Concrete Audio Ported 12″ Subwoofer Enclosure – Birch Wood Trunk Box

Elevate your bass performance with the Concrete Audio Ported Subwoofer Enclosure, engineered to house a single 12″ subwoofer and deliver deep, powerful low frequencies with enhanced efficiency. This ported (bass-reflex) design allows both the subwoofer and port to fire toward the rear of your vehicle’s trunk, resulting in stronger, deeper bass response ideal for hatchbacks, sedans, and SUVs.

Built from 3/4″ birch wood with rounded corner port edges and a black trunk liner, this enclosure combines rugged construction with acoustic optimization. It also includes oxygen-free copper wire screw-in terminal cups for secure connections and poly fill to help smooth internal resonance and improve bass quality. Compatible with Concrete Audio C3 Series 12″ subwoofers and also suitable for C0 and C1 Series 12″ drivers, this enclosure is a versatile choice for custom car audio systems.

Key Features:

• Designed for 1 × 12″ subwoofer (C3 Series & compatible with C0/C1)

• Ported (bass-reflex) design for deeper, louder bass

• Birch wood construction with black trunk liner

• Rounded port edges and 1.5″ baffle for optimized airflow

• Oxygen-free copper wire screw-in terminal cups

• Poly fill for internal resonance control

• Ideal for trunk installations and powerful low-end output

• Dimensions: ~14.25″ H × 33″ L × 15″ W